<template>
  <el-container class="home-container">
      <el-header>
        <div><img src="../assets/heima.png" alt="">
        <span>后台管理系统</span></div>
        <el-button type="info" @click="logout">退出</el-button>
    </el-header>
      <el-container>
        <el-aside :width="isCollapse?'64px':'200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
            <el-col>
            <el-menu
                background-color="#333744"
                active-text-color="#4098ff"
                class="el-menu-vertical-demo"
                text-color="#fff"
                :unique-opened="true"
                :collapse="isCollapse"
                :collapse-transition="false"
                :router="true"
                :default-active="actviePath"
            >
                    <!-- 一级菜单 -->
                <el-sub-menu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                    <!-- 一级菜单模板区 -->
                <template #title>
                    <!-- 图标 -->
                    <el-icon :class="iconsObj[item.id]"></el-icon>
                    <!-- 文本 -->
                    <span>{{item.authName}}</span>
                </template>

                <!-- 二级菜单 -->
                <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children"
                :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                    <template #title>
                    <!-- 图标 -->
                    <el-icon><Menu /></el-icon>
                    <!-- 文本 -->
                    <span>{{subItem.authName}}</span>
                </template>
                </el-menu-item>

                </el-sub-menu>
            </el-menu>
            </el-col>
            
        </el-aside>

        <el-main>
            <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
</template>

<script>
export default {
    data() {
        return {
            // 左侧菜单数据
            menulist: [],
            iconsObj: {
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao',
            },
            // 是否折叠
            isCollapse: false,
            // 被激活的地址 用于外标签的高亮
            actviePath:''
        }
    },
    created() {
        this.getMenuList();
        this.actviePath = window.sessionStorage.getItem('activePath')
    },  
    methods: {
        logout() {
            // 清空token
            window.sessionStorage.clear();
            // 跳转至登录页
            this.$router.push("/login");
        },
        //获取所有菜单
        async getMenuList() {
            const { data: res } = await this.$http.get('menus');
            if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
            this.menulist = res.data;
            console.log(res);
        },
        toggleCollapse() {
            this.isCollapse = !this.isCollapse
        },
        saveNavState(actviePath) {
            window.sessionStorage.setItem('activePath', actviePath);
            this.actviePath = actviePath;
        }
    }
}
</script>

<style lang="less" scoped>
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0%;
    align-items: center;
    font-size: 20px;
    color: #fff;
    >div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}

.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: 0;
    }
}

.el-main{
    background-color: #eaedf1;
}

.home-container{
    height: 100%;
}

.iconfont{
    margin-right: 10px;
}

.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    // 文本间距
    letter-spacing: 0.2em;
    cursor: pointer;
}


</style>